| Learning objectives |
 In
this lesson you will learn the definition of a
comma and study the usage of commas. |
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| Definition of a comma |
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- A comma is used to:
- separate elements in a
sentence, introductory
clause, words in a series, parenthetical
phrase, or
interjection
- separate items in lists, and to present large numbers in
a more readable form
- when using commas in a number in English, the commas are
placed before every third digit, starting from the right
- commas can change the meaning of a
sentence depending on placement
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| Usage of commas |
- Commas in numbers
- "fifteen million" is written as "15,000,000"
- "twelve thousand fifty-one dollars and seven cents" is
written as "$12,051.07"
- Commas changing the meaning of a
sentence
- "The teacher beat the scholar with a whip." (a simple
description)
- "The teacher beat the scholar, with a whip." (expression
of outrage)
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